// MD5
var hexcase = 0;
var b64pad = "";
var chrsz = 8;

function hex_md5(s) {
    return binl2hex(core_md5(str2binl(s), s.length * chrsz))
}

function b64_md5(s) {
    return binl2b64(core_md5(str2binl(s), s.length * chrsz))
}

function str_md5(s) {
    return binl2str(core_md5(str2binl(s), s.length * chrsz))
}

function hex_hmac_md5(key, data) {
    return binl2hex(core_hmac_md5(key, data))
}

function b64_hmac_md5(key, data) {
    return binl2b64(core_hmac_md5(key, data))
}

function str_hmac_md5(key, data) {
    return binl2str(core_hmac_md5(key, data))
}

function md5_vm_test() {
    return hex_md5("abc") == "900150983cd24fb0d6963f7d28e17f72"
}

function core_md5(x, len) {
    x[len >> 5] |= 128 << ((len) % 32);
    x[(((len + 64) >>> 9) << 4) + 14] = len;
    var a = 1732584193;
    var b = -271733879;
    var c = -1732584194;
    var d = 271733878;
    for (var i = 0; i < x.length; i += 16) {
        var olda = a;
        var oldb = b;
        var oldc = c;
        var oldd = d;
        a = md5_ff(a, b, c, d, x[i + 0], 7, -680876936);
        d = md5_ff(d, a, b, c, x[i + 1], 12, -389564586);
        c = md5_ff(c, d, a, b, x[i + 2], 17, 606105819);
        b = md5_ff(b, c, d, a, x[i + 3], 22, -1044525330);
        a = md5_ff(a, b, c, d, x[i + 4], 7, -176418897);
        d = md5_ff(d, a, b, c, x[i + 5], 12, 1200080426);
        c = md5_ff(c, d, a, b, x[i + 6], 17, -1473231341);
        b = md5_ff(b, c, d, a, x[i + 7], 22, -45705983);
        a = md5_ff(a, b, c, d, x[i + 8], 7, 1770035416);
        d = md5_ff(d, a, b, c, x[i + 9], 12, -1958414417);
        c = md5_ff(c, d, a, b, x[i + 10], 17, -42063);
        b = md5_ff(b, c, d, a, x[i + 11], 22, -1990404162);
        a = md5_ff(a, b, c, d, x[i + 12], 7, 1804603682);
        d = md5_ff(d, a, b, c, x[i + 13], 12, -40341101);
        c = md5_ff(c, d, a, b, x[i + 14], 17, -1502002290);
        b = md5_ff(b, c, d, a, x[i + 15], 22, 1236535329);
        a = md5_gg(a, b, c, d, x[i + 1], 5, -165796510);
        d = md5_gg(d, a, b, c, x[i + 6], 9, -1069501632);
        c = md5_gg(c, d, a, b, x[i + 11], 14, 643717713);
        b = md5_gg(b, c, d, a, x[i + 0], 20, -373897302);
        a = md5_gg(a, b, c, d, x[i + 5], 5, -701558691);
        d = md5_gg(d, a, b, c, x[i + 10], 9, 38016083);
        c = md5_gg(c, d, a, b, x[i + 15], 14, -660478335);
        b = md5_gg(b, c, d, a, x[i + 4], 20, -405537848);
        a = md5_gg(a, b, c, d, x[i + 9], 5, 568446438);
        d = md5_gg(d, a, b, c, x[i + 14], 9, -1019803690);
        c = md5_gg(c, d, a, b, x[i + 3], 14, -187363961);
        b = md5_gg(b, c, d, a, x[i + 8], 20, 1163531501);
        a = md5_gg(a, b, c, d, x[i + 13], 5, -1444681467);
        d = md5_gg(d, a, b, c, x[i + 2], 9, -51403784);
        c = md5_gg(c, d, a, b, x[i + 7], 14, 1735328473);
        b = md5_gg(b, c, d, a, x[i + 12], 20, -1926607734);
        a = md5_hh(a, b, c, d, x[i + 5], 4, -378558);
        d = md5_hh(d, a, b, c, x[i + 8], 11, -2022574463);
        c = md5_hh(c, d, a, b, x[i + 11], 16, 1839030562);
        b = md5_hh(b, c, d, a, x[i + 14], 23, -35309556);
        a = md5_hh(a, b, c, d, x[i + 1], 4, -1530992060);
        d = md5_hh(d, a, b, c, x[i + 4], 11, 1272893353);
        c = md5_hh(c, d, a, b, x[i + 7], 16, -155497632);
        b = md5_hh(b, c, d, a, x[i + 10], 23, -1094730640);
        a = md5_hh(a, b, c, d, x[i + 13], 4, 681279174);
        d = md5_hh(d, a, b, c, x[i + 0], 11, -358537222);
        c = md5_hh(c, d, a, b, x[i + 3], 16, -722521979);
        b = md5_hh(b, c, d, a, x[i + 6], 23, 76029189);
        a = md5_hh(a, b, c, d, x[i + 9], 4, -640364487);
        d = md5_hh(d, a, b, c, x[i + 12], 11, -421815835);
        c = md5_hh(c, d, a, b, x[i + 15], 16, 530742520);
        b = md5_hh(b, c, d, a, x[i + 2], 23, -995338651);
        a = md5_ii(a, b, c, d, x[i + 0], 6, -198630844);
        d = md5_ii(d, a, b, c, x[i + 7], 10, 1126891415);
        c = md5_ii(c, d, a, b, x[i + 14], 15, -1416354905);
        b = md5_ii(b, c, d, a, x[i + 5], 21, -57434055);
        a = md5_ii(a, b, c, d, x[i + 12], 6, 1700485571);
        d = md5_ii(d, a, b, c, x[i + 3], 10, -1894986606);
        c = md5_ii(c, d, a, b, x[i + 10], 15, -1051523);
        b = md5_ii(b, c, d, a, x[i + 1], 21, -2054922799);
        a = md5_ii(a, b, c, d, x[i + 8], 6, 1873313359);
        d = md5_ii(d, a, b, c, x[i + 15], 10, -30611744);
        c = md5_ii(c, d, a, b, x[i + 6], 15, -1560198380);
        b = md5_ii(b, c, d, a, x[i + 13], 21, 1309151649);
        a = md5_ii(a, b, c, d, x[i + 4], 6, -145523070);
        d = md5_ii(d, a, b, c, x[i + 11], 10, -1120210379);
        c = md5_ii(c, d, a, b, x[i + 2], 15, 718787259);
        b = md5_ii(b, c, d, a, x[i + 9], 21, -343485551);
        a = safe_add(a, olda);
        b = safe_add(b, oldb);
        c = safe_add(c, oldc);
        d = safe_add(d, oldd)
    }
    return Array(a, b, c, d)
}

function md5_cmn(q, a, b, x, s, t) {
    return safe_add(bit_rol(safe_add(safe_add(a, q), safe_add(x, t)), s), b)
}

function md5_ff(a, b, c, d, x, s, t) {
    return md5_cmn((b & c) | ((~b) & d), a, b, x, s, t)
}

function md5_gg(a, b, c, d, x, s, t) {
    return md5_cmn((b & d) | (c & (~d)), a, b, x, s, t)
}

function md5_hh(a, b, c, d, x, s, t) {
    return md5_cmn(b ^ c ^ d, a, b, x, s, t)
}

function md5_ii(a, b, c, d, x, s, t) {
    return md5_cmn(c ^ (b | (~d)), a, b, x, s, t)
}

function core_hmac_md5(key, data) {
    var bkey = str2binl(key);
    if (bkey.length > 16) {
        bkey = core_md5(bkey, key.length * chrsz)
    }
    var ipad = Array(16), opad = Array(16);
    for (var i = 0; i < 16; i++) {
        ipad[i] = bkey[i] ^ 909522486;
        opad[i] = bkey[i] ^ 1549556828
    }
    var hash = core_md5(ipad.concat(str2binl(data)), 512 + data.length * chrsz);
    return core_md5(opad.concat(hash), 512 + 128)
}

function safe_add(x, y) {
    var lsw = (x & 65535) + (y & 65535);
    var msw = (x >> 16) + (y >> 16) + (lsw >> 16);
    return (msw << 16) | (lsw & 65535)
}

function bit_rol(num, cnt) {
    return (num << cnt) | (num >>> (32 - cnt))
}

function str2binl(str) {
    var bin = Array();
    var mask = (1 << chrsz) - 1;
    for (var i = 0; i < str.length * chrsz; i += chrsz) {
        bin[i >> 5] |= (str.charCodeAt(i / chrsz) & mask) << (i % 32)
    }
    return bin
}

function binl2str(bin) {
    var str = "";
    var mask = (1 << chrsz) - 1;
    for (var i = 0; i < bin.length * 32; i += chrsz) {
        str += String.fromCharCode((bin[i >> 5] >>> (i % 32)) & mask)
    }
    return str
}

function binl2hex(binarray) {
    var hex_tab = hexcase ? "0123456789ABCDEF" : "0123456789abcdef";
    var str = "";
    for (var i = 0; i < binarray.length * 4; i++) {
        str += hex_tab.charAt((binarray[i >> 2] >> ((i % 4) * 8 + 4)) & 15) + hex_tab.charAt((binarray[i >> 2] >> ((i % 4) * 8)) & 15)
    }
    return str
}

function binl2b64(binarray) {
    var tab = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
    var str = "";
    for (var i = 0; i < binarray.length * 4; i += 3) {
        var triplet = (((binarray[i >> 2] >> 8 * (i % 4)) & 255) << 16) | (((binarray[i + 1 >> 2] >> 8 * ((i + 1) % 4)) & 255) << 8) | ((binarray[i + 2 >> 2] >> 8 * ((i + 2) % 4)) & 255);
        for (var j = 0; j < 4; j++) {
            if (i * 8 + j * 6 > binarray.length * 32) {
                str += b64pad
            } else {
                str += tab.charAt((triplet >> 6 * (3 - j)) & 63)
            }
        }
    }
    return str
};
/**
 //需要发布到服务器上运行，并且server端需要处理跨域
 //在IndexController.java上加@CrossOrigin(origins={"*"})

 sdk.config({
    url : 'http://localhost:8080/api'
    ,app_key : 'test'
    ,secret : '123456'
    ,jwt : 'xxx'
});

 sdk.post({
	name   : 'goods.get' // 接口名
// 	,version:'1.0'
// 	,access_token:''
	,data  : {'goods_name':'iphone'} // 请求参数
	,callback:function(resp) { // 成功回调
		console.log(resp)
	}
});

 sdk.post({
	name   : 'goods.get' // 接口名
	,data  : {'goods_name':'iphone'} // 请求参数
	,callback:function(resp) { // 成功回调
		console.log(resp)
	}
});
 */
;(function () {

    var config = {
        url: 'http://127.0.0.1:8080/api'
        , app_key: 'test'
        , secret: '123456'
        , default_version: ''

        , api_name: "name"
        , version_name: "version"
        , app_key_name: "app_key"
        , data_name: "data"
        , timestamp_name: "timestamp"
        , sign_name: "sign"
        , format_name: "format"
        , access_token_name: "access_token"
        , jwt: ''
    }

    var DEFAULT_FORMAT = 'json';
    var UPLOAD_FORM_DATA_NAME = 'body_data';
    var CONTENT_TYPE_JSON = 'application/json';

    var CONTENT_TYPE_KEY = 'Content-Type';
    var POST_TYPE = 'POST';
    var GET_TYPE = 'GET';

    function copy(source, target) {
        if (target && source && typeof source == 'object') {
            for (var p in source) {
                target[p] = source[p];
            }
        }
        return target;
    }

    function add0(m) {
        return m < 10 ? '0' + m : m
    }

    function formatDate(time) {
        var y = time.getFullYear();
        var m = time.getMonth() + 1;
        var d = time.getDate();
        var h = time.getHours();
        var mm = time.getMinutes();
        var s = time.getSeconds();
        return y + '-' + add0(m) + '-' + add0(d) + ' ' + add0(h) + ':' + add0(mm) + ':' + add0(s);
    }

    /** 构建签名 */
    function buildSign(postData, secret) {
        if (typeof postData === 'string') {
            throw new Error('postData类型必须json对象');
        }
        var paramNames = [];
        for (var key in postData) {
            paramNames.push(key);
        }

        paramNames.sort();

        var paramNameValue = [];

        for (var i = 0, len = paramNames.length; i < len; i++) {
            var paramName = paramNames[i];
            paramNameValue.push(paramName);
            paramNameValue.push(postData[paramName]);
        }

        var source = secret + paramNameValue.join('') + secret;
        // MD5算法参见http://pajhome.org.uk/crypt/md5/
        return hex_md5(source).toUpperCase();
    }

    var ajax = {
        /**
         * 提交请求
         * @param opts.url 请求url
         * @param opts.params 请求参数json
         * @param opts.headers 请求header，json
         * @param opts.form 表单dom对象
         * @param opts.callback 回调
         * @param opts.error 错误回调
         */
        request: function (opts) {
            var url = opts.url;
            var params = opts.params;
            var headers = opts.headers;
            var form = opts.form;
            var callback = opts.callback;
            var error = opts.error || function (e) {
                alert('数据请求失败')
            };
            var method = opts.method;
            var paramStr = JSON.stringify(params);

            var xhr = this.createXhrObject();

            xhr.onreadystatechange = function () {
                var jsonData = '';
                if (xhr.readyState == 4) {
                    var status = xhr.status;
                    if ((status >= 200 && status < 300) || status == 304) {
                        jsonData = JSON.parse(xhr.responseText);
                        callback(jsonData, paramStr);
                    } else {
                        jsonData = JSON.parse('{"message":"后台请求错误(status:' + status + ')"}');
                        console.log(xhr.responseText)
                        error(jsonData, paramStr);
                    }
                }
            };
            if (method == GET_TYPE) {
                var queryString = [];
                for (var key in params) {
                    var p = key + '=' + encodeURIComponent(params[key]);
                    queryString.push(p);
                }
                url = url + '?' + queryString.join('&');
            }

            xhr.open(method, url, true);

            // 添加header
            if (headers) {
                for (var key in headers) {
                    xhr.setRequestHeader(key, headers[key]);
                }
            }
            var postData = null;
            if (method == POST_TYPE) {
                if (form) {
                    var formData = new FormData(form);
                    // 添加json
                    formData.append(UPLOAD_FORM_DATA_NAME, paramStr);
                    postData = formData;
                } else {
                    xhr.setRequestHeader(CONTENT_TYPE_KEY, CONTENT_TYPE_JSON);
                    postData = paramStr;
                }
            }
            // 发送请求
            xhr.send(postData);
        }
        /**
         * 创建XHR对象
         * @private
         */
        , createXhrObject: function () {
            var methods = [
                function () {
                    return new XMLHttpRequest();
                }
                , function () {
                    return new ActiveXObject('Msxml2.XMLHTTP');
                }
                , function () {
                    return new ActiveXObject('Microsoft.XMLHTTP');
                }
            ];

            var xhr = null;
            for (var i = 0, len = methods.length; i < len; i++) {
                try {
                    xhr = methods[i]();
                } catch (e) {
                    continue;
                }

                this.createXhrObject = methods[i];

                return xhr;
            }

            throw new Error("创建XHR对象失败");
        }
    }

    /**
     * 请求
     * @param opts.name 接口名
     * @param opts.version 版本号
     * @param opts.method 请求方式
     * @param opts.data 请求数据，json对象
     * @param opts.access_token
     * @param opts.form 表单dom
     * @param opts.callback 响应回调
     * @param opts.jwt jwt
     */
    function request(opts) {
        var name = opts.name,
            version = opts.version || config.default_version,
            data = opts.data || {},
            callback = opts.callback,
            accessToken = opts.access_token,
            url = opts.url || config.url;

        var headers = {};
        var postData = {};

        postData[config.api_name] = name;
        postData[config.version_name] = version;
        postData[config.app_key_name] = config.app_key;
        postData[config.data_name] = encodeURIComponent(JSON.stringify(data));
        postData[config.timestamp_name] = formatDate(new Date());
        postData[config.format_name] = DEFAULT_FORMAT;

        if (accessToken) {
            postData[config.access_token_name] = accessToken;
        }

        postData[config.sign_name] = buildSign(postData, config.secret);

        var jwt = opts.jwt || config.jwt; // 优先使用opts中的jwt
        if (jwt) {
            headers['Authorization'] = 'Bearer ' + jwt;
        }

        ajax.request({
            url: url
            , method: opts.method
            , params: postData
            , headers: headers
            , form: opts.form
            , callback: callback
            , error: opts.error
        });
    }

    var sdk = {
        config: function (cfg) {
            copy(cfg, config);
        }
        /**
         * post请求
         * @param opts.name 接口名
         * @param opts.version 版本号
         * @param opts.data 请求数据，json对象
         * @param opts.access_token
         * @param opts.form 表单dom
         * @param opts.callback 响应回调
         * @param opts.jwt jwt
         */
        , post: function (opts) {
            opts.method = POST_TYPE;
            request(opts);
        }
        /**
         * get请求
         * @param opts.name 接口名
         * @param opts.version 版本号
         * @param opts.data 请求数据，json对象
         * @param opts.access_token
         * @param opts.callback 响应回调
         * @param opts.jwt jwt
         */
        , get: function (opts) {
            if (opts.form) {
                throw new Error('get方式不支持上传功能');
            }
            opts.method = GET_TYPE;
            request(opts);
        }

    }

    window.sdk = sdk;

})();